I believe you should only invest in bitcoin at this point, you may find that the market is volatile and difficult to predict, but it can be seen that only a small bitcoin adjustment can make The price of altcoin is very strong. So in order to minimize risk I believe that at this time you should only invest in bitcoin.
It is good suggestion specially for newbie in trading. But as a trader better to take risk, but in small money avoid to take risk with altcoin and in this position, Bitcoin is all the time best and forever best.